Arctic Ocean hits irreversible chemical tipping point as ice loss drains nitrate
TL;DR
Two decades of data show sun-driven nutrient loss after sea ice retreats triggers benthic denitrification on shallow Arctic shelves, causing irreversible nitrate depletion and pushing the Arctic Ocean past a tipping point around 2009. The nitrate famine is already reshaping the food web from plankton to fish, seabirds, and marine mammals, with potential impacts on North Atlantic fisheries and broader marine ecosystems, and researchers say the system is unlikely to revert to its previous state without major changes in ice cover.
Topics:worldenvironment#arctic-ocean#benthic-denitrification#climate-change#environment#nitrate-depletion#sea-ice-loss
- Arctic ocean passes 'irreversible' chemical tipping point Oceanographic Magazine
- Arctic Ocean food chain is disrupted as a key tipping point has now been passed Phys.org
- Arctic Ocean passed a tipping point and scientists say it may never recover ScienceDaily
- Irreversibly broken: Arctic Ocean crosses point of no return India Today
- 'Profound implications': Study finds Arctic Ocean ecosystem may have already passed 'major tipping point' in 2009 BusinessGreen
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